May I recommend Hopi (http://www.hopixsyon.com/). We are a good aligned and mature group of gamers. We aren't a multi-gaming guild, and we plan on playing on the US server, but we do have a significant amount of EU members, including some of our leaders. Check us out and see if you like what you see. And, regardless of who you prefer to go with, good luck to you and we'll see you in Xsyon!
Feel free to check out the Audacian Republic. We are a world wide guild, with players from all over the world, some EU, some US, and Australia. To see what we are about, please click on my sig and check out our webpage. Good luck, and enjoy the game.